Warning
If excessive force is needed to screw a marker sphere onto its pin, dispose of the marker
sphere and use a new one.
Warning
If you use marker spheres on, or in the vicinity of, oscillating or vibrating instruments,
check the marker spheres at regular intervals to ensure that they remain securely attached.
GENERAL INSTRUMENTATION
Instrument User Guide Rev. 2.3 Cranial/ENT Optical 25